For example, the content on Super Weddings is useful whether you're organizing a wedding today or next year. All the content on the site is created accordingly. To make things easier for the audience, it is separated into categories to make it very convenient for the reader to find what they're looking for. This, of course, is also very good for SEO.
Outbrain is not necessarily the network of choice, it was just an example. As for tracking the ROI usually you'll want to track campaigns in Google analytics and track clicks on affiliate links as event and average value/email or you'll want to duplicate the post and run paid traffic to the duplicate so you know exactly what the conversions are as you can put them in separate email lists etc too.
Just like to add 1 additional "CON" to the list of Pros and Cons of Clickbank. Their rule on paying out the commissions earned. You must have 5 sales all from different credit card accounts before they will pay you what you have earned. That flat out sucks!. Affiliates work hard to get even 1 sale and because of Clickbanks rule, lose that money over time if they cannot get another 4 sales, the commission keeps reducing steadily if 4 more sales are not forthcoming. Clickbank has got to change that rule, which many feel is illegal!. A sale, is a sale, and the commission must be paid out. Basically, Clickbank is "Ripping-Off" affiliate marketers.
I got a question about the funnel. You were talking about the first page to be a blog page. I interpreted it as having you own blog(website), that should compete with other expert website. I was wondering if the first step of your funnel can be the opt-in page. The blogs that refers to the opt-in page are guestblogposts on expert websites, so multiple ways of traffic and seo. So you are only building an opt-in page, thank you page, landing pages etc on your website, but no blog to become an expert. Is that something you can do? Or is that not Google friendly or most expert websites are against?